<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>登录</title>
</head>
<body>
    <form action="/haha/loginServlet" method="post">
        <input name="username" placeholder="请输入用户名">
        <input name="password" type="password" placeholder="请输入密码">
        <input type="submit" value="登录">
    </form>
</body>
</html>